/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.ksb.messaging.dao.impl;

 import java.util.List;

 import java.util.Map;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import javax.persistence.Query;

 import javax.xml.namespace.QName;

 import org.kuali.rice.core.api.config.CoreConfigHelper;

 import org.kuali.rice.core.api.exception.RiceRuntimeException;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.Criteria;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.QueryByCriteria;

 import org.kuali.rice.core.util.RiceUtilities;

 import org.kuali.rice.ksb.messaging.PersistedMessageBO;

 import org.kuali.rice.ksb.messaging.PersistedMessagePayload;

 import org.kuali.rice.ksb.messaging.dao.MessageQueueDAO;

 import org.kuali.rice.ksb.util.KSBConstants;

 public class MessageQueueDAOJpaImpl implements MessageQueueDAO {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(MessageQueueDAOJpaImpl.class);

     @PersistenceContext

     private EntityManager entityManager;

     @SuppressWarnings("unchecked")

     public List<PersistedMessageBO> findAll() {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Returning all persisted messages");

         }

         Query query = entityManager.createNamedQuery("PersistedMessageBO.FindAll");

         return (List<PersistedMessageBO>) query.getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessageBO> findAll(int maxRows) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Finding next " + maxRows + " messages");

         }

         Query query = entityManager.createNamedQuery("PersistedMessageBO.FindAll");

         query.setMaxResults(maxRows);

         return (List<PersistedMessageBO>) query.getResultList();

     }

     public PersistedMessagePayload findByPersistedMessageByRouteQueueId(Long routeQueueId) {

         return (PersistedMessagePayload) entityManager.find(PersistedMessagePayload.class, routeQueueId);

     }

     public PersistedMessageBO findByRouteQueueId(Long routeQueueId) {

         return (PersistedMessageBO) entityManager.find(PersistedMessageBO.class, routeQueueId);

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessageBO> findByServiceName(QName serviceName, String methodName) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Finding messages for service name " + serviceName);

         }

         Query query = entityManager.createNamedQuery("PersistedMessageBO.FindByServiceName");

         query.setParameter("serviceName", serviceName.toString());

         query.setParameter("methodName", methodName);

         return (List<PersistedMessageBO>) query.getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessageBO> findByValues(Map<String, String> criteriaValues, int maxRows) {

         Criteria criteria = new Criteria(PersistedMessageBO.class.getName());

         for(Map.Entry<String, String> entry : criteriaValues.entrySet()) {

             criteria.eq(entry.getKey(), entry.getValue());

         }

         QueryByCriteria query = new QueryByCriteria(entityManager, criteria);

         return query.toQuery().getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessageBO> getNextDocuments(Integer maxDocuments) {

         String applicationId = CoreConfigHelper.getApplicationId();

         Query query = entityManager.createNamedQuery("PersistedMessageBO.GetNextDocuments");

         query.setParameter("applicationId", applicationId);

         query.setParameter("queueStatus", KSBConstants.ROUTE_QUEUE_EXCEPTION);

         query.setParameter("ipNumber", RiceUtilities.getIpNumber());

         if (maxDocuments != null)

             query.setMaxResults(maxDocuments);

         return (List<PersistedMessageBO>) query.getResultList();

     }

     public void remove(PersistedMessageBO routeQueue) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Removing message " + routeQueue);

         }

         if (routeQueue.getRouteQueueId() == null) {

             throw new RiceRuntimeException("can't delete a PersistedMessageBO with no id");

         }

         routeQueue = entityManager.merge(routeQueue);

         entityManager.remove(routeQueue);

         if (routeQueue.getPayload() != null) {

             PersistedMessagePayload payload =  entityManager.merge(routeQueue.getPayload());

             entityManager.remove(payload);

         }

     }

     public void save(PersistedMessageBO routeQueue) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Persisting message " + routeQueue);

         }

         PersistedMessageBO jpaInstance = entityManager.merge(routeQueue);

         Long routeQueueId = jpaInstance.getRouteQueueId();

         Integer verNo = jpaInstance.getLockVerNbr();

         routeQueue.setRouteQueueId(routeQueueId);

         routeQueue.setLockVerNbr(verNo);

         if (routeQueue.getPayload() != null) {

             routeQueue.getPayload().setRouteQueueId(routeQueueId);

             entityManager.merge(routeQueue.getPayload());

         }

     }

     public EntityManager getEntityManager() {

         return this.entityManager;

     }

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

 }